patch 7.4.1464
Problem:    When the argument of sort() is zero or empty it fails.
Solution:   Make zero work as documented. (suggested by Yasuhiro Matsumoto)
diff --git a/src/version.c b/src/version.c
index f4ffb8f..24a27cc 100644
--- a/src/version.c
+++ b/src/version.c
@@ -744,6 +744,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1464,
+/**/
     1463,
 /**/
     1462,